Cartridge for oil filters



Nov. 12, 1940. T. E. ALDHAM CARTRIDGE FOR OIL FILTERS Filed Jan. Z7,1938 INVENTOR. YZ0/a5 ima/ff ATTORNEYS.

Patented Nov. 12, 1940 charmes ron on. mrsas Thomas E. Aldhani,Providence, B. L assigner to Fleming Manufacturing tion f Rhode 'IslandAppuesnon'rmusr'y 21.19311, No. 187,110

a claim. (ci. 21o- 1an This invention relates to an oil lter of thevtype used in connection with engines which depend for their functioningupon a continual circulation of lubricant; and this invention1 has forone of its objects the provision of an arrangementv whereby should theiiltering medium become clogged a supply of. lubricant would still becirculated to lubricate parts of the engine.

Another object of the invention is the provision of means to by-pass thefiltering medium should the pressure required for passage of the oilthrough the filtering medium increase to such anf extent as to endangerthe supply of lubricant to the moving parts of the engine.

Another object of the invention is the provision of a by-pass means inthe cartridge which is'V removed and replenished so as to assure a freshby-pass means each time the cartridge ls changed. and prevent failureo'f the by-pass closure to direct the oil as desired by reason of-i'atigue of resilient means usually used for causing.

such closure.

With these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully described, andparticularly pointed out in the appended claims.

In the accompanying drawing:

l is a sectional view of a filter casing with so cartridge thereinillustrating my improved byv pass container within the cartridge:

Flg.,2 is a sectional view on line 2-2 of Fig. l. It is considereddesirable to provide 4for a bypass of a nlter in the event thecartrldgebecomes 35 so clogged that the oil will not readily pass therethrough.Such a by-pass is sometimes provided in the mounting for the iiltercasing or in the casing in such a manner that it` remains continually insuch location throughout the life of o the mounting or casing. Such abypass usually has some sort of a springer resilient means for operatingit. I'his spring through frequent operation often becomes `fatigued andthe valve means for controlling the by-passis permitted to u open andthe functioning of the niter medium does n'ot Play the part which it isintended to perform. Accordingly, I have'chosen to locate the by-pass inthe cartridge vwhich is intended to be removed from time to time andwhich 5g serves to protect the lubricating system should thecartrldgcbecome'clogged or the pressure be increased while at the sametinie asthe cartridge is removed from time to time a fresh resilient closurevalve'is supplied each time a new cari6 trldge is put inplace and thefatiguingand failure of the closure is eliminated; and thefollowing is amore detailed' description of the present embodiment of this invention,illustrating they preferred means by which these advantageous resultsmay be accomplished:

'With reference to the drawing, Il designates a casing of generallycylindrical form having a bulging bottom wall il provided with adischarge conduit I2. 'The' side wall of the casing is bulged outwardlyas at Il provided with an inlet conduit 10 Il. A cover I5 is located onthe outwardly flanged portion I2 of the side wall which is bolted inplace by suitable'fastening means I1. Apacking I8 exists between thecover and the ilange for sealing the cover in'positio'n. 1

A cartridge designated generally I! is also of cylindrical formationhavinga .bottom wall,20 and a top wall 2| both of which.'y are iirmlysecured in position on the cylindrical'side wall while there is acentral opening 22 formed by tube 20 23 extending axially through thecylinder I9. Filter material 2l is positioned within the cartridge. Aresilient spring or handle 25 which engages the cover serves to forcethe cartridge downwardly on the packing 28 to form a seal 25 between theinlet and outlet conduits.

'I'he top wall 2l in the portion above the centralopening 22 is providedwith anopening 21 which receives a housing 28 comprising an upper wall2! having a hole 3l therein which is sealed 30 by a ball 3| urged intoengagement with the edges of the opening by a-sprlng 22 engaging thein-turned lips 22.0f the side walls 24 and leaving anv opening 2lbetween them. Oil which enters through the conduit Il passes through the85 perforations 28 in the cylindrical wall of the cartridge Il throughthe filter mediumil and outV through the perforations 31 in the tube 23.The entire .volume of the chambers 28 and 2l at the sides and top of thecartridge are full oi' 4o oil and should the pressure in this volume ofoil increase beyondvthe pre-determined calculated pressure of the spring32 whichl forces the valvev 3l to closed position, the valve would thenbe forced-inwardly against the vspring and the oil s would pass throughhole 3l` through-the spring chamber and out through the space` 3lthroughthe central opening v22 and out the ydischarge conduitv l2, thus,by-p'assing the filter medium 24. If, however. thepressure doesnot existbeyond a predetermined calculated amount, the oil will then pass throughthe nlter medium 24 down to the tube 22 and out through the conduit I2.l

us, a lay-pass is provided which protects the c ting vsupply .oflubricant to the engine ena it n 'se llocated and ended by sa cartridgeum it-wm be removed when un .eem-loge is re- IBBSOD. bf fatigue.

moved or changed that a fresh one be substituted therefor, thusreplacing the resilient portion of the by-pass before any injury maycome to it by The foregoing description is directed solely towards theconstruction illustrated, butvI desire it to be understood `that l'Ireserve the privilege o f resorting' to all the mechanical changes towhich the device is susceptible. the invention being defined and limitedonly bythe terms of the appended claims.

I claim: y 1. A filtercartridge comprising a package of filteringmaterial, a perforated wall surrounding and permanently enclosing saidfiltering mate,-

rial andvhaving annular imperforate end walls over the ends of saidnltering material, a central tubular discharge conduit secured at itsends to saidend walls andhaving perforations and ex-v tending throughthe filtering material for outlet of the filtrate after its passagethrough the filtering material, a by-pass conduit within said dischargeconduit and supported at the upper end of the'cartridge to afford apassage of the i'iltered liquid from the direction of the upper end wailof the cartridge when excessive pressure or clogging of theiliteringmaterial occurs, said by-pass conduit comprising a housing having a sidewall I. spaced from the perforated portion of said distween said upperand lower walls of said housing, to normally urge said ball into aclosed fluid charge conduit, upper and lower end walls in said housingeach with a central opening therein, a ball valve for engaging the edgesof the opening in said upper end wall, and a spring acting befor egressof the nitrate after its passage through the filtering material, aby-pass conduit within said tube and carried by the upper end wall ofthe cartridge to afford a passage of the filtered liquid from thedirection of the vupper endwall of the cartridge whenA excessivepressure or clogging of comprising a housing `having a side wallspacedfrom the perforated part of said discharge con duit, upper and lower endwalls in said housing each-with a central opening therein, a ball valve"normally engaging theedges of the opening in `,said upper end -wali ofthe housing for controlwalls extending through the filtering materiallfor egresa'of` the filtrate after its passage through the filteringmaterial, `a by-pass conduit'within vthe ltering material occurs, saidby-pass conduit said tube and carried by the upper end wall of thecartridge to afford a passage of the filtered liquid from the directionof the upper end wall of the cartridge when excessive pressureorclogging of the filtering material occurs, said by-pass conduitcomprising a housing having a side wall concentric with and spaced fromthe perforated part oi' said tube and extending inwardly thereof fromthe upper end wall of the cartridge, upper and lower end walls in saidhousing each with 'a central opening, said upper end wall of saidhousing being secured to the-annular upper end wall of the cartridge andhaving an opening the edges of which form a seat for a ball valve, aball valve the edges of said opening in said upper end wall, and aspring acting between said upper and lower walls of said housing tcnormally urge saidball into a closed position i THOMAS E. ALDHAM.

